Retry Setting - Mitsubishi Electric MELSEC iQ-R Series User Manual

Retry setting

Series
MELSEC-Q series
MELSEC iQ-R series
Window
[Setting]  [Option Setting]  [Retry] tab
Displayed items
Item

Sending retry function
Retry upper limit
Retry interval
Offline transition
Number of retries
notification
Counting method
Count clearing
SECS/GEM communication software
Non-GEM version


Description
Select this checkbox to enable the SECS/GEM communication software function to resend
automatically when an equipment-issued transaction has failed.
A retry occurs when a response timeout (T3 timeout) or sending error of the communication protocol
results.
A new transaction ID of the retry message is assigned.
Configure the number of retries.
When this number of retries is attempted, and the final message results in a response timeout, it is
treated as a T3 timeout error, S9 and F9 are sent, and spooling starts.
The initial message is not included in the count.
For details, refer to the following:
Page 98 Retry operations during T3 timeouts
Configure the retry interval in milliseconds.
The default is 5000 ms (5 seconds).
Configure whether to cancel retrying and transfer to an offline state (retry cancel) or transfer to an offline
state after retry completion when an "Offline" control request occurred and an offline transition occurred
due to a ladder program during message retry.
Configure the register to store the number of retries performed.
Select the counting method for the number of retries.
• When "By message" was selected for the counting method, the number of message retries during the
current retry attempt is stored in the number of retries notification.
If the transaction was successful while retrying, this is initialized to 0.
When the retry limit was reached, it is initialized to 0 when the next message sent successfully.
Normally, it is initialized to 0 at the sending of S9 and F9.
• When "Accumulate" was selected as the counting method, the number of retries to be added with
each retry occurrence is stored in the number of retries notification.
When the value reaches 65535, counting stops.
Configure the trigger to initialize the value of the number of sending retries notification register to "0" at
the arbitrary timing of the programmable controller CPU.
After initialization is run, this trigger is switched OFF by the SECS/GEM communication software.
Use this mainly to clear the accumulated number.
GEM version


GEM advanced version


7 BASIC FUNCTIONS
7.7 Option Setting
7
97